JPS60500909A - リン酸及び硫酸カルシウムの製法 - Google Patents
リン酸及び硫酸カルシウムの製法Info
- Publication number
- JPS60500909A JPS60500909A JP59501075A JP50107584A JPS60500909A JP S60500909 A JPS60500909 A JP S60500909A JP 59501075 A JP59501075 A JP 59501075A JP 50107584 A JP50107584 A JP 50107584A JP S60500909 A JPS60500909 A JP S60500909A
- Authority
- JP
- Japan
- Prior art keywords
- calcium sulfate
- liquid phase
- hemihydrate
- phosphoric acid
- concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 title claims description 148
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims description 78
- 238000000034 method Methods 0.000 title claims description 50
- 229910000147 aluminium phosphate Inorganic materials 0.000 title claims description 39
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 61
- 239000007791 liquid phase Substances 0.000 claims description 59
- 239000000203 mixture Substances 0.000 claims description 43
- 238000006243 chemical reaction Methods 0.000 claims description 32
- 150000004683 dihydrates Chemical class 0.000 claims description 27
- 238000002425 crystallisation Methods 0.000 claims description 18
- 229910019142 PO4 Inorganic materials 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 15
- 230000008025 crystallization Effects 0.000 claims description 15
- 235000021317 phosphate Nutrition 0.000 claims description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 14
- 239000010452 phosphate Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 7
- 239000011575 calcium Substances 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 7
- 229910052925 anhydrite Inorganic materials 0.000 claims description 6
- 239000001506 calcium phosphate Substances 0.000 claims description 6
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 6
- 235000011010 calcium phosphates Nutrition 0.000 claims description 6
- 235000011149 sulphuric acid Nutrition 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 230000007717 exclusion Effects 0.000 claims description 2
- 239000012071 phase Substances 0.000 claims description 2
- 229910052602 gypsum Inorganic materials 0.000 claims 2
- 239000010440 gypsum Substances 0.000 claims 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical class [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 1
- 230000007547 defect Effects 0.000 claims 1
- 150000004677 hydrates Chemical class 0.000 claims 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims 1
- 229940095672 calcium sulfate Drugs 0.000 description 49
- 239000007787 solid Substances 0.000 description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000012360 testing method Methods 0.000 description 14
- 150000004684 trihydrates Chemical class 0.000 description 10
- 239000011121 hardwood Substances 0.000 description 8
- 238000000605 extraction Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 5
- 239000000706 filtrate Substances 0.000 description 4
- 241000257465 Echinoidea Species 0.000 description 3
- 241000207961 Sesamum Species 0.000 description 3
- 235000003434 Sesamum indicum Nutrition 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229940057306 hemihydrate calcium sulfate Drugs 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 244000132059 Carica parviflora Species 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 241000212342 Sium Species 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 229940057307 dihydrate calcium sulfate Drugs 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000003097 mucus Anatomy 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011403 purification operation Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/228—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen one form of calcium sulfate being formed and then converted to another form
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/228—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen one form of calcium sulfate being formed and then converted to another form
- C01B25/229—Hemihydrate-dihydrate process
- C01B25/2295—Hemihydrate-dihydrate process the conversion being performed in one or more vessels different from those used for reaction after separation of phosphoric acid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/466—Conversion of one form of calcium sulfate to another
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Saccharide Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Materials For Medical Uses (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU84.713 | 1983-03-25 | ||
| LU84713A LU84713A1 (fr) | 1983-03-25 | 1983-03-25 | Procede et preparation d'acide phosphorique et de sulfate de calcium hemihydrate alpha |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60500909A true JPS60500909A (ja) | 1985-06-20 |
| JPH0454615B2 JPH0454615B2 (el) | 1992-08-31 |
Family
ID=19730065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59501075A Granted JPS60500909A (ja) | 1983-03-25 | 1984-03-13 | リン酸及び硫酸カルシウムの製法 |
Country Status (23)
| Country | Link |
|---|---|
| US (1) | US4588570A (el) |
| EP (1) | EP0169842B1 (el) |
| JP (1) | JPS60500909A (el) |
| AT (1) | ATE37017T1 (el) |
| AU (1) | AU569070B2 (el) |
| BR (1) | BR8407074A (el) |
| CA (1) | CA1211919A (el) |
| DE (1) | DE3473867D1 (el) |
| DK (1) | DK558184D0 (el) |
| ES (1) | ES530972A0 (el) |
| FI (1) | FI78054C (el) |
| GR (1) | GR81479B (el) |
| IL (1) | IL71295A (el) |
| IN (1) | IN160318B (el) |
| IT (1) | IT1173450B (el) |
| LU (1) | LU84713A1 (el) |
| MA (1) | MA20070A1 (el) |
| MX (1) | MX168186B (el) |
| OA (1) | OA07998A (el) |
| PH (1) | PH21586A (el) |
| SU (1) | SU1653540A3 (el) |
| WO (1) | WO1984003690A1 (el) |
| ZA (1) | ZA842107B (el) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013512837A (ja) * | 2009-12-02 | 2013-04-18 | プレイヨン テクノロジーズ | リン酸の生成方法 |
| JP2014516908A (ja) * | 2011-06-01 | 2014-07-17 | プレイオン テクノロジーズ | 二水和物／半水和物型のリン酸生成方法 |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3583209D1 (de) * | 1984-11-05 | 1991-07-18 | Prayon Dev Sa | Kontinuierliches verfahren zur herstellung von phosphorsaeure und von calciumsulfat. |
| JPS63144107A (ja) * | 1986-12-08 | 1988-06-16 | Mitsui Toatsu Chem Inc | 高濃度燐酸−半水石こうスラリ−の濾過方法 |
| US5169444A (en) * | 1986-02-20 | 1992-12-08 | Gebruder Knauf Westdeutsche Gipswerke Kg | Process for preparing calcium sulfate anhydrite |
| NO2771280T3 (el) | 2011-10-24 | 2018-07-21 | ||
| BR112015021526A2 (pt) * | 2013-03-08 | 2017-07-18 | Mosaic Co | produção de ácido fosfórico por um processo de cristalização em dois estágios |
| RU2599525C1 (ru) * | 2015-04-23 | 2016-10-10 | Открытое акционерное общество "Научно-исследовательский институт по удобрениям и инсектофунгицидам имени профессора Я.В. Самойлова" (ОАО "НИУИФ") | Способ получения экстракционной фосфорной кислоты |
| CN105776303A (zh) * | 2016-01-30 | 2016-07-20 | 瓮福（集团）有限责任公司 | 一种α型半水石膏的生产方法 |
| BE1023754B1 (fr) * | 2016-06-23 | 2017-07-12 | Prayon Technologies | Procede de production de sulfate de calcium |
| DE102016212242B4 (de) | 2016-07-05 | 2019-02-07 | Technische Universität Bergakademie Freiberg | Verfahren zur Herstellung von Phosphorsäure aus phosphorhaltigen Primär- und Sekundärrohstoffen |
| CA3072408A1 (fr) * | 2017-08-11 | 2019-02-14 | Prayon Technologies | Procede d'attaque acide d'une source phosphatee |
| DE102020100241A1 (de) * | 2020-01-08 | 2021-07-08 | Thyssenkrupp Ag | Verfahren zur Herstellung von Phosphorsäure und Klinkerprozess-geeigneter Kalziumsulfatqualität zur kommerziellen und industriellen Verwertung von Kalziumsulfat |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4870696A (el) * | 1971-12-27 | 1973-09-25 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL29556C (el) * | 1930-02-13 | |||
| GB1092055A (en) * | 1964-03-06 | 1967-11-22 | Roman Chelminski | Process for the production of phosphoric acid |
| US3416887A (en) * | 1964-08-05 | 1968-12-17 | Central Glass Co Ltd | Method of manufacturing wet process phosphoric acid |
| US3632307A (en) * | 1969-04-09 | 1972-01-04 | Albatros Super Fosfaatfabrieke | Process for the preparation of phosphoric acid and gypsum from phosphate rock |
| GB1520273A (en) * | 1974-07-06 | 1978-08-02 | Fisons Ltd | Phosphoric acid and gypsum from phosphatic material |
| JPS5851884B2 (ja) * | 1975-08-13 | 1983-11-18 | 日産化学工業株式会社 | 濾過性の良好な半水石膏を含有する高濃度燐酸の製造方法 |
| FR2409230A1 (fr) * | 1977-11-16 | 1979-06-15 | Rhone Poulenc Ind | Procede de fabrication d'acide phosphorique |
| NL7909057A (nl) * | 1979-12-15 | 1981-07-16 | Unie Van Kunstmestfab Bv | Werkwijze voor de bereiding van fosforzuur en calciumsulfaathemihydraat. |
-
1983
- 1983-03-25 LU LU84713A patent/LU84713A1/fr unknown
-
1984
- 1984-03-13 AT AT84900958T patent/ATE37017T1/de not_active IP Right Cessation
- 1984-03-13 JP JP59501075A patent/JPS60500909A/ja active Granted
- 1984-03-13 AU AU26514/84A patent/AU569070B2/en not_active Ceased
- 1984-03-13 BR BR8407074A patent/BR8407074A/pt not_active IP Right Cessation
- 1984-03-13 EP EP84900958A patent/EP0169842B1/fr not_active Expired
- 1984-03-13 DE DE8484900958T patent/DE3473867D1/de not_active Expired
- 1984-03-13 WO PCT/BE1984/000008 patent/WO1984003690A1/fr active IP Right Grant
- 1984-03-13 US US06/673,436 patent/US4588570A/en not_active Expired - Lifetime
- 1984-03-19 IT IT20123/84A patent/IT1173450B/it active
- 1984-03-20 IL IL71295A patent/IL71295A/xx not_active IP Right Cessation
- 1984-03-21 ZA ZA842107A patent/ZA842107B/xx unknown
- 1984-03-21 IN IN187/MAS/84A patent/IN160318B/en unknown
- 1984-03-22 CA CA000450228A patent/CA1211919A/en not_active Expired
- 1984-03-23 MA MA20292A patent/MA20070A1/fr unknown
- 1984-03-23 MX MX008340A patent/MX168186B/es unknown
- 1984-03-23 GR GR74192A patent/GR81479B/el unknown
- 1984-03-24 ES ES530972A patent/ES530972A0/es active Granted
- 1984-03-26 PH PH30441A patent/PH21586A/en unknown
- 1984-11-23 DK DK558184A patent/DK558184D0/da not_active Application Discontinuation
-
1985
- 1985-04-17 FI FI851524A patent/FI78054C/fi not_active IP Right Cessation
- 1985-04-23 OA OA58575A patent/OA07998A/xx unknown
- 1985-04-24 SU SU853891173A patent/SU1653540A3/ru active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4870696A (el) * | 1971-12-27 | 1973-09-25 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013512837A (ja) * | 2009-12-02 | 2013-04-18 | プレイヨン テクノロジーズ | リン酸の生成方法 |
| JP2014516908A (ja) * | 2011-06-01 | 2014-07-17 | プレイオン テクノロジーズ | 二水和物／半水和物型のリン酸生成方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| FI851524L (fi) | 1985-04-17 |
| PH21586A (en) | 1987-12-11 |
| ZA842107B (en) | 1984-10-31 |
| FI78054B (fi) | 1989-02-28 |
| ES8507078A1 (es) | 1985-09-16 |
| IL71295A0 (en) | 1984-06-29 |
| IT1173450B (it) | 1987-06-24 |
| IL71295A (en) | 1987-10-20 |
| EP0169842B1 (fr) | 1988-09-07 |
| GR81479B (el) | 1984-12-11 |
| CA1211919A (en) | 1986-09-30 |
| ATE37017T1 (de) | 1988-09-15 |
| WO1984003690A1 (fr) | 1984-09-27 |
| AU2651484A (en) | 1984-10-09 |
| IT8420123A0 (it) | 1984-03-19 |
| EP0169842A1 (fr) | 1986-02-05 |
| OA07998A (fr) | 1987-01-31 |
| MA20070A1 (fr) | 1984-10-01 |
| MX168186B (es) | 1993-05-10 |
| IN160318B (el) | 1987-07-04 |
| JPH0454615B2 (el) | 1992-08-31 |
| BR8407074A (pt) | 1985-08-27 |
| DE3473867D1 (en) | 1988-10-13 |
| FI851524A0 (fi) | 1985-04-17 |
| SU1653540A3 (ru) | 1991-05-30 |
| FI78054C (fi) | 1989-06-12 |
| DK558184A (da) | 1984-11-23 |
| DK558184D0 (da) | 1984-11-23 |
| LU84713A1 (fr) | 1984-11-14 |
| AU569070B2 (en) | 1988-01-21 |
| ES530972A0 (es) | 1985-09-16 |
| US4588570A (en) | 1986-05-13 |
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